Dog Age Calculator
Convert dog years to human years with the updated formula that accounts for size and breed.
Human Equivalent Age
38
human years
Adult
Life Stage
Adult
Typical Lifespan
10–13 years
Dog Age Conversion (by size)
| Year 1 | 15 human years (all sizes) |
| Year 2 | 9 human years (all sizes) |
| Years 3+ (Small) | +4 human years each |
| Years 3+ (Medium) | +4.5 human years each |
| Years 3+ (Large) | +5 human years each |
| Years 3+ (Giant) | +6 human years each |
Life Stages
| Puppy | < 15 human years |
| Junior | 15–24 human years |
| Adult | 24–50 human years |
| Senior | 50–70 human years |
| Geriatric | 70+ human years |
Modern research shows that the old "multiply by 7" rule is inaccurate. Larger dogs age faster than smaller dogs after the first two years. Breed, genetics, and health also play a role.
Use the Dog Age Calculator above to calculate your results. Enter your values and see instant results — all calculations run in your browser.
Disclaimer: This calculator is for informational purposes only and does not constitute tax, financial, or legal advice. Results are estimates based on the information you provide and current rates. Always consult a qualified tax professional or financial advisor for advice specific to your situation.
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